Alloy



Patented Mar. 13, 1923.

UNITED STATES PATENT OFFICE.

mm o'noum, or cnrcaco, ILLINOIS, AssIGNoa r0 CRANE COMPANY, or

cnrcaoo, ILLINOIS, A conPo m'rIoN or rLLINoIs.

ALLOY.

10 Drawing.

' plumbing fixtures, valve discs, valve casings,

and the like.

Fixtures of this character have heretofore customarily been nickel-plated to give them the desired luster and appearance. My improved alloy however obviates the labor and expense ofnickel-plating since the alloy itself from which the articles are, formed possesses the capability of taking a high polish so as to present .a luster which closely simulates in appearance nickel-plating. Furthermore, the alloy is adapted. to retain this luster to a very high degree without tending to tarnish, and, in addition, since an article made from this alloy is homogeneous throughout, there is no liability of the luster being worn ofl by prolonged usage so as to detract from the pleasing appearance of 'the article as frequently occurs in nickelplated articles when the plating wears or chi s off.

n alloy made in accordance with my invention is composed of metals in substan-' tially the following proportions.

Percent. Copper 50 to Zinc 8 to 20 Nickel 10 to 25 Lead 3 to 10 Tin 1 to 5 Antimony 5 to 2 Iron 0 to 2 While variations in the proportions of the ingredients will impart to the alloy different characteristics as to hardness, strength ductility, etc., I have found that roportions within the ranges above speci ed are suitable for the various articles which I contemplate manufacturing therefrom. The ingredients are melted together to form the Application and February 27, 1922. senii No. 539,755.

alloy which can be poured while molten into molds in which it is cast into the desired form. The resultant product is nearly white in color, approximating closely to the color, of nickel, and it is sufliciently soft to enable -it to be readily and rapidly machined.

After the machining operations, if the character of the article requires machine work, the surfaces of the article may be polished in any well known or preferred manner, and as the result of the polishing operation and without depositing thereon any coating or I plating whatsoever, the article takes on a high luster closely resembling nickel-plating, in appearance, which luster it will retain without tendency to tarnish.

lyhile in most instances no iron whatever or only a trace is employed, I have found that a small quantity thereofis not detrimental and for some articles is advantageous. The antimony lends itself to the capabilities of the alloyto assume a high polish and present a lustrous appearance, but since largerquantities of antimony tend to make the alloy more brittle and diflicult to machine. I prefer to restrict the quantity of this ingredient substantially within the limits above specified.

It should be apparentfrom the foregoing that I have provided an alloy possessin highly desirable properties and capable 6 many uses, and it should be manifest that a considerable range in proportions of the the scope of my invention as defined in the following claims.

I claim 1. An alloy, consisting of the following ingredients in substantially the proportions specified: copper 50 to 65 per cent; iinc;

amount, but not over 2 per cent. ANDREW OROURKE.

85 various ingredients may be invoked within Certificate of Correction.

it is hereby certified that in Letters Patent No. 1,448,571, nted March"13, 1923, upon the application of Andrew ORourke, of Chicago, linois, for an improvement in Alloys, an error appOaIS in the printed specification requiring correction as followsz lage 1. line 4-2. for the numeral 5 read .5; and that the said Letters Patent should be road with this correction therein that the same may conform to the record of the ("$150 in tho Patent Office.

Signed and sealed this 3d day of April, A. D., 1923.

KARL FENNING,

[SEAL] Acting Commissioner of Patents. 

